1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.example.android.supportv7.widget;
18
19import android.support.v4.view.ViewCompat;
20import android.support.v7.widget.DividerItemDecoration;
21import android.support.v7.widget.LinearLayoutManager;
22import android.support.v7.widget.LinearSnapHelper;
23import android.support.v7.widget.RecyclerView;
24
25import com.example.android.supportv7.R;
26import com.example.android.supportv7.widget.util.ConfigToggle;
27
28/**
29 * A sample activity that uses {@link LinearLayoutManager}.
30 */
31public class LinearLayoutManagerActivity extends BaseLayoutManagerActivity<LinearLayoutManager> {
32    private DividerItemDecoration mDividerItemDecoration;
33    private LinearSnapHelper mLinearSnapHelper;
34    private boolean mSnapHelperAttached;
35
36    @Override
37    protected LinearLayoutManager createLayoutManager() {
38        return new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
39    }
40
41    @Override
42    protected void onRecyclerViewInit(RecyclerView recyclerView) {
43        mDividerItemDecoration = new DividerItemDecoration(this, mLayoutManager.getOrientation());
44        recyclerView.addItemDecoration(mDividerItemDecoration);
45        mLinearSnapHelper = new LinearSnapHelper();
46    }
47
48    @Override
49    protected ConfigToggle[] createConfigToggles() {
50        return new ConfigToggle[]{
51                new ConfigToggle(this, R.string.checkbox_orientation) {
52                    @Override
53                    public boolean isChecked() {
54                        return mLayoutManager.getOrientation() == LinearLayoutManager.HORIZONTAL;
55                    }
56
57                    @Override
58                    public void onChange(boolean newValue) {
59                        mLayoutManager.setOrientation(newValue ? LinearLayoutManager.HORIZONTAL
60                                : LinearLayoutManager.VERTICAL);
61                        if (mDividerItemDecoration != null) {
62                            mDividerItemDecoration.setOrientation(mLayoutManager.getOrientation());
63                        }
64
65                    }
66                },
67                new ConfigToggle(this, R.string.checkbox_reverse) {
68                    @Override
69                    public boolean isChecked() {
70                        return mLayoutManager.getReverseLayout();
71                    }
72
73                    @Override
74                    public void onChange(boolean newValue) {
75                        mLayoutManager.setReverseLayout(newValue);
76                    }
77                },
78                new ConfigToggle(this, R.string.checkbox_layout_dir) {
79                    @Override
80                    public boolean isChecked() {
81                        return ViewCompat.getLayoutDirection(mRecyclerView) ==
82                                ViewCompat.LAYOUT_DIRECTION_RTL;
83                    }
84
85                    @Override
86                    public void onChange(boolean newValue) {
87                        ViewCompat.setLayoutDirection(mRecyclerView, newValue ?
88                                ViewCompat.LAYOUT_DIRECTION_RTL : ViewCompat.LAYOUT_DIRECTION_LTR);
89                    }
90                },
91                new ConfigToggle(this, R.string.checkbox_stack_from_end) {
92                    @Override
93                    public boolean isChecked() {
94                        return mLayoutManager.getStackFromEnd();
95                    }
96
97                    @Override
98                    public void onChange(boolean newValue) {
99                        mLayoutManager.setStackFromEnd(newValue);
100                    }
101                },
102                new ConfigToggle(this, R.string.checkbox_snap) {
103                    @Override
104                    public boolean isChecked() {
105                        return mSnapHelperAttached;
106                    }
107
108                    @Override
109                    public void onChange(boolean newValue) {
110                        mLinearSnapHelper.attachToRecyclerView(newValue ? mRecyclerView : null);
111                        mSnapHelperAttached = newValue;
112                    }
113                }
114        };
115    }
116}
117